How do you recognize a leaking fuel injector nozzle during testing?
How do you recognize a leaking fuel injector nozzle during testing?
Look very closely at each fuel injector head where it connects to the fuel rail. Look for any obvious dribbling leaks or fuel spray pattern on the rail, injector body or cylinder head. Smell for gas. A leak at the injector head will indicate bad O-ring seals inside the injector body.
How do you test electronic diesel injectors?
Connect the clip of the automotive test light to the negative terminal of your vehicle’s battery. Then take the pointed tip of the test light and touch it to the small bit of exposed wire on the fuel injector connector. The test light should light up if the injector is functioning properly.
How do you test a fuel injection nozzle?
Chatter Test 1. Purge air from nozzle according to the instructions above. 2. Compare the audible chatter of the nozzle to the manufacturer’s recommendations (if applicable to the nozzle being tested). Leakage Test 1. Open the pump isolator valve and the gauge protector valve about 1/4 turn from the closed position. Close the ON/OFF valve. 2.
What should I do if my diesel injector is not working?
With something to catch any fuel, try each injector in turn releasing the fuel pipe nut ½ a turn. If the engine note changes then the injector is at least doing something. If there is no change then the cylinder isn’t firing – if compression is ok then the injector is likely to be faulty.
Why does my diesel injector squirt solid fuel?
When the injector was tested it squirted a solid jet of fuel – not atomised as it should have been. When rotated, the tip of the valve was also seen to be bent, a sign of mishandling of the injector outside the engine at some time. These are a pair of old (top) and new valves from equivalent nozzles.
What do you listen for when fuel injector is activated?
Bring your ear close to the rod and listen for clicking. Lean your ear close to the end of the metal rod or screwdriver that is opposite the injector. As the engine runs, listen for an audible clicking sound given off by the injector. This sound indicates the injector being activated.
Chatter Test 1. Purge air from nozzle according to the instructions above. 2. Compare the audible chatter of the nozzle to the manufacturer’s recommendations (if applicable to the nozzle being tested). Leakage Test 1. Open the pump isolator valve and the gauge protector valve about 1/4 turn from the closed position. Close the ON/OFF valve. 2.
With something to catch any fuel, try each injector in turn releasing the fuel pipe nut ½ a turn. If the engine note changes then the injector is at least doing something. If there is no change then the cylinder isn’t firing – if compression is ok then the injector is likely to be faulty.
How are fuel injector tips honed in Rochester diesel?
All injector tips in a set are honed to flow the same amount of fuel to within a 2% range. To guarantee this Rochester Diesel runs all honed nozzles through our custom built flow machine. Rochester Diesel’s flow machine flow tests injectors using calibration fluid instead of air (as recommended by Kennametal.)
When the injector was tested it squirted a solid jet of fuel – not atomised as it should have been. When rotated, the tip of the valve was also seen to be bent, a sign of mishandling of the injector outside the engine at some time. These are a pair of old (top) and new valves from equivalent nozzles.
